Sydniiee is a hairstylist out of California whose amazing hair transformations are some of the coolest on Instagram. She takes girls from ombre hair to rainbow strands on the reg, and the results are always eye-catching.

One of her more recent videos, a cool rainbow undercut look, is going viral with more than 406k views, and counting! That's because Sydniiee is showing how she blends the colors together just like makeup. And it's mesmerizing.

In the InstaVid above, she uses Wella dye and a hair painting brush to blend the colors together. She calls this ColorMelt. It gives the hair a cooler, more laid-back rainbow look than harsher color-blocking. Look at how many times it's been re-grammed. People can't get enough.

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Sydniiee thanked fans of her work on Twitter, saying how big of a deal it is for her work to be so admired. "I f****** put everything into my work," she wrote. "I care about it more than most things, and to have that many people take 15seconds to admire my s***😭"

She also revealed exciting things to come.

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